JPH0266308A - Assembly tool - Google Patents

Abstract

PURPOSE:To aim at facilitating the firm assembly and at preventing collapse and vibration, by providing a locking member including a locking section connected at one end to a cam having an eccentric cylindrical outer surface and disposed in a casing body, and locking at the other end a member to be fixed while projected from the casing body so that the locking member is adapted to extend and retract the locking section in association with the rotation of the cam. CONSTITUTION:A resin casing body 10 composed of a top plate 11 and a cylindrical casing 12 is formed therein with a circular hole 13 in which a rotary shaft 21 of a cam 20 is loosely fitted, and a cutout 17 and a fitting groove 18 in a projected part 16. The cam is composed of the rotary shaft 21, an eccentric cam section 24 having a cylindrical outer surface 23 eccentric from the rotary shaft 21 and a disc 22. An arm part 31 is projected from a ring section 33 having an engaging part 32 which can be fitted on the cylindrical outer surface 23, and is provided at its front end with a saw tooth-like pawl 35 so as to form a locking part, which is disposed in the casing body 10. Accordingly, the projection degree of the pawl 35 clamping and fixing a member to be fixed is changed so as to firmly but easily fix the member, and thereby it is possible to prevent the member from being damaged, and to also prevent occurrence of vibration and collapse.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an assembly tool for assembling a base material and a material to be fixed, and particularly relates to an assembly tool for assembling a base material and a fixed material, and particularly for assembling a side plate and a back plate in assembled furniture. Concerning assembly tools that are effective during assembly.

[Prior Art] Conventionally, when assembling orthogonal plates such as side plates and back plates in assembling furniture, the two plates were fixed together using nails, screws, bolts, etc. However, when nails or the like are used, the board may absorb moisture and become wavy. Therefore, grooves for inserting the back plate are provided in the side plates, top plate, and bottom plate that form the framework of the furniture, and the back plate is simply inserted into the groove, and the frame is sometimes assembled by screwing or the like.

[Problems to be Solved by the Invention] However, in recent years, compressed plywood and plywood are often used instead of natural wood as furniture materials. These furniture materials are
For example, there is a problem in that it is weak against over-tightening of screws and is easily damaged. In addition, there was a problem that when the screws were fixed with screws, etc., the screw holes were likely to collapse, and the screws were easy to loosen or be pushed back.
It was difficult to correct the position of the back plate etc.

In addition, in the case of a device that is inserted into a groove, the back plate is not fixed to the side plate or the like, so there is a problem that it is likely to rattle. In particular, if the back plate of a stereo rack or the like tends to rattle, there is often the problem that unpleasant vibration sounds are generated while listening to records. In general, the backboard only serves a decorative function, and for example, when a force that crushes the frame diagonally is applied, the frame easily deforms and the furniture is easily crushed.

In other words, it has been desired to develop an assembly tool that can easily and firmly assemble the back plate and side plates, etc., that can easily adjust the mounting position of the back plate, and that can prevent crushing of the furniture and generation of vibration. .

Configuration of the Invention Therefore, in the present invention, in order to solve the above problems, the following configuration is adopted.

[Means for Solving the Problems] That is, the gist of the present invention is as follows: A main body case attached to a base material; a cam having a cylindrical outer surface; an engaging portion that engages with the cylindrical outer surface at one end; and a locking portion that locks the material to be fixed at the other end; and a locking member that can move forward and backward with the locking portion protruding from the main body case as the cam rotates, and the cam is rotated to lock the fixed material with the locking member. The assembly tool is characterized in that it is configured to be able to integrate the and the base material.

[Operation] First, the assembly tool of the present invention is attached to a base material. Next, rotate the cam to move the locking member, bring one side of the material to be fixed into contact with the locking part of the locking member, and bring the other side into contact with the base material or main body case to apply a pressing force. By rotating the cam in such a manner that the fixing member is clamped between the locking portion and the base material, or between the locking portion and the main body case, the material to be fixed is tightly integrated. As a result, the base material and the material to be fixed are firmly assembled.

[Example] Next, one embodiment of the present invention will be described based on the drawings.

As shown in FIG. 1, the assembly tool 1 includes a main body case 10 made of synthetic resin, a cam 20, and a locking member 30 made of metal.

The main body case 10 consists of a rectangular top plate 11 and a cylindrical case 12 protruding from the bottom surface of the top plate 11. The top plate 11 has a circular hole 13 into which the rotating shaft 21 of the cam 20 is loosely fitted. It is provided on the same axis as the central axis of 12. Also,
The outer surface of the cylindrical case 12 is provided with a locking step 14 having a sawtooth cross section as shown in FIG. 3(B). Roughly speaking, a rectangular parallelepiped-shaped protrusion 16 formed integrally with the outer surface of the cylindrical case 12 is provided on the central lower surface of one edge 15 of the top plate 11, and an arm of the locking member 30 is provided at the lower part of the protrusion 16. A notch 17 is provided for the portion 31 to move forward and backward. Also, cylindrical case 1
A fitting groove 18 for fitting the cam 20 is provided on the lower inner surface of 2.
is engraved. Further, a protrusion 19 is provided along the periphery of the circular hole 13 on the protrusion 16 side and extends over a predetermined range of the lower surface of the top plate 11. In this embodiment, the protrusion 19 is formed in an arc shape with a center angle 80' centered on the center line A-A as shown in FIG. 3(A).

The cam 20 has a rotating shaft 21 and a lower end of the rotating shaft 21.
1 and an eccentric cam portion 24 having a cylindrical outer surface 23 eccentric to the rotating shaft 21. A hexagonal hole 25 into which a hexagonal wrench can be inserted is bored in the upper end surface of the rotating shaft 21. Furthermore, a fitting ring 26 that fits into the fitting groove 18 is provided protruding from the peripheral edge of the disc 22 . Furthermore, as shown in FIG. 3(A), a stepped groove 28 is provided at the upper part of the eccentric cam portion 24 along the rotation shaft 21.
When the cam 20 is assembled to the main body case 10, the protrusion 19 is configured to fit into the stepped groove 28. In this embodiment, the stepped groove 28 is formed over 270° of the peripheral wall of the rotating shaft 21.

The locking member 30 includes a ring portion 33 having a cylindrical engagement portion 32 in the center into which the eccentric cam portion 24 can be inserted;
3, and a locking portion 34 formed by bending the tip of the arm portion 31 vertically upward. The distal end of the locking portion 34 is provided with a sawtooth pawl 35 that is bent at a right angle roughly toward the engaging portion 32 .

Note that reinforcing ribs 36 are formed on the center lines of the arm portions 31 and the locking portions 34 by press molding.

The assembly tool 1 includes an eccentric cam portion 24 arranged as shown in FIG.
The cam 20 with the engaging portion 32 of the locking member 30 loosely fitted into the main body case 1 is pressed against the disk 22 while loosely fitting the rotation 121 into the circular hole 13, and the fitting ring 26 is inserted into the fitting groove 18. It is assembled by fitting it into the Here, when the protrusion 19 comes into contact with one end 28a of the step groove 28, as shown in FIG.
As shown in FIG. 4(a), the engaging member 30 is at the maximum protruding position, and when it comes into contact with the other end 28b, the locking member 30 is at a position slightly beyond the maximum retracted position as shown in FIG. 4(a).

The assembly tool assembled as described above is press-fitted into the mounting hole 41 provided at a predetermined position of the base material 40, as shown in FIG. The base material 40 further has a mounting groove 42 into which a fixed member 50 can be inserted, and a locking member 3 of the assembly tool 1, as shown in the figure.
A guide groove 43 in which the 0 moves forward and backward is provided. When the assembly tool 1 is press-fitted into the mounting hole 41, the locking step portion 14 bites into the base material 40 and is firmly fixed, as shown in FIG. 3(B). Note that the front surface of the protrusion 16 is in the mounting groove 4 within the guide groove 43.
Mounting hole 41 and mounting groove 43 so as to match the right side shown in 2.
is provided.

After that, as shown in FIGS. 3(a) and 3(b), the mounting groove 42
Insert the member 50 to be fixed inside. At this time, the thickest part 27 of the eccentric cam part 24 is located on the guide groove 43 side so that the locking member 30 is at the most protruding position, and the fixed member 50
is located between the claw 35 and the base material 40.

Next, when the hexagonal wrench (path shown) inserted into the hexagonal hole 25 is rotated in the clockwise direction shown in the drawing, the engaging part 32 draws an arc around the central axis of the eccentric cam part 24 while sliding on the cylindrical outer surface 23. exercise. When the cam 20 rotates until the maximum thickness portion 27 is at a position 10 degrees below the right side of the line A-A as shown in FIGS. After being pulled in along the dotted chain line), it is moved slightly in the protruding direction. At this time, the claw 35 of the locking member 30
At the same time, the material to be fixed 50 is drawn to the base material 40 and is held between the protrusion 16 and the locking part 34 of the assembly tool 1, so that the right side surface of the mounting groove 42 It is tightly fixed to the base material 40 at. On the other hand, when the hex wrench is reversed, the cam 20 returns to the position shown in FIGS. It becomes possible.

As a result of the above, the member 50 to be fixed can be easily and reliably fixed to the base member 40 by operating the hexagonal wrench. In particular, in this embodiment, since the claws 35 bite into the material to be fixed 50 and fix it, the claws 35 are attached to the material to be fixed 50 upward (base material 4) in FIG. 4(B).
Even if a force is applied to pull it backward (in the direction of the 0 plane), it will not recover.

In actual furniture assembly, a predetermined number of assembly tools 1 are attached to the base material 40 at predetermined intervals, and the fixed material 50 is fixed to the base material 40 as necessary. Not just for decoration, but as a strength member, and
It can be firmly assembled to prevent it from being photographed. In addition, the material to be fixed 50 can be easily fixed and fixed by simply rotating the cam 20.
Release modification can be performed. Furthermore, by providing the protrusion 19 and the step groove 28, the cam 20 is positioned slightly beyond the desired point (maximum retracted position of the engaging member 30) when the fixed member 50 and the base material 40 are integrated. It will be stopped at .

Therefore, even if a force is applied to separate the fixed material 50 from the base material 40 after the fixed material 50 is fixed, the cam 20 will not rotate. In addition, even if compressed plywood, plywood, etc. are used as the furniture material, the installation of the assembly tool 1 must be done depending on the direction and the fixed material 5.
Since the direction of attracting
And the base material 40 will not be damaged.

Although one embodiment of the present invention has been described above, the present invention is not limited to this in any way, and various embodiments can be adopted without departing from the gist thereof.

For example, sufficient fixing force can be obtained even if the claws 35 are not provided and only the locking portions 34 are tightly clamped. In addition, the locking portion 34
As shown in FIG.
', the member to be fixed 50- may be moved in the direction of the arrow shown in the figure to press the member 50- into tight contact with the left side surface of the mounting groove 42' as shown in the figure, and be fixedly assembled to the base member 40=. A claw 35' is provided protrudingly as shown by the dotted line in the figure, and the member to be fixed 50'
Of course, it is also possible to have it penetrate into the body.

In addition, the material of the assembly tool may be made entirely of metal, and the base material,
Depending on the material of the material to be fixed, it is also possible to make the entire structure made of synthetic resin.

Effects of the Invention As described above, according to the present invention, the material to be fixed and the base material can be easily and firmly integrated, and the mounting position of the material to be fixed can be easily corrected. Furthermore, the material to be fixed and the base material will not be damaged, regardless of the material of the material to be fixed. In addition, it can prevent furniture from being crushed or vibrated.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of the assembly tool of the embodiment, FIG. 2 is a perspective view showing an example of how the assembly tool, base material, and fixed material are assembled, and FIG. 3 (A) is a plan view before fixing. The same (b) is the cross-sectional view, the 4th
Figure (A) is a plan view of the fixing bolt, Figure (B) is a cross-sectional view thereof, and Figure 5 is a plan view of the main part of a modified example. 1... Assembly tool 10... Main body case 20.
...Cam 21... Rotating shaft 23... Cylindrical outer surface 30... Locking member 32... Engaging portion
34,34"...Locking part 40.40-...Base material 50,50"...Fixed material agent Patent attorney Tsutomu Seitachi (2 idiots) Fig. 1 Fig. 2 O Fig. 3 (b) Figure 4 (a) (b)

Claims (1)

[Scope of Claims] A main body case attached to a base material; a cam rotatably disposed within the main body case and having a cylindrical outer surface formed eccentrically with respect to a rotation axis; and one end engaged with the cylindrical outer surface. The other end has a locking portion that locks the material to be fixed, and is assembled into the main body case, and as the cam rotates, the locking portion is removed from the main body case. and a locking member that is protruded and movable forwards and backwards, and is configured such that by rotating the cam, the locking member locks the fixed material to integrate the fixed material and the base material. Features assembly tools.